About This Guide
This guide covers the Deepwater Horizon oil spill (also known as the Gulf of Mexico Oil Spill or the BP Oil Spill). It is the largest marine oil spill in history, and was caused by an explosion on the Deepwater Horizon offshore oil platform about 50 miles southeast of the Mississippi River delta on April 20, 2010 (28.74°N, 88.39°W). The Deepwater Horizon sank in about 5,000 feet (1,500 m) of water on April 22, 2010. After a series of failed efforts to plug the leak, BP said on July 15 that it had capped the well, stopping the flow of oil into the Gulf of Mexico for the first time in 86 days.